The correct spelling for the word "Dianium" is /daɪˈeɪniəm/. The first syllable is pronounced as "die" and the second syllable as "ay". The letter "i" between "d" and "a" shows the Latin origin of the word. The suffix "-ium" indicates a chemical element, which suggests that "Dianium" could be a fictional element. Making sure to spell words correctly is important to ensure clear communication. Utilizing phonetic transcriptions can help learners understand how to pronounce and spell words accurately.